Removable snatch roller



July 14, 1953 .1. GUADAGNA 2,645,187

REMOVABLE SNATCH ROLLER Filed July 21, 1951 Patented July I4, 1953REMovABL/ESNATCHRQLLER Joseph Guadagna, Brooklyn, N. Y. Application July21, 1951', serial No.`237,945 y z claims. (ci. 10s-154)Y v My inventionrelates to a removable snatch 9' roller and the combination andadaptation" of parts of the same as Will be more fully hereinafter setforth. y Y

In loading a ship, the present practice isto handle the various itemsbeing loaded by a crane Y from the pier over and down the hatch intorthe hold where the crew in the hold gradually lower it onto greasedskids or dunnage and rollers` The wire-of a; drag wire snatch block isthen secured around theitem being loadedwhich is secured at the otherendito a hook fastened in the wally of the hold and the item is draggedto the nearest point where it is to be stored and'jimmied and pushedback into its final position. Duringthis long process of placing theitem in its `finally loaded position the whipper wire of the loadingcrane is kept in use in this opera-tion and vnot released until the itemVis finally placed in its loaded position. This tie up of the mainloading crane during the placing of each item in the hold also ties upthe entire pier loading crew until the whipper wire is released therebycausingva tremendous loss of time for the entire loading crew amountingto ten minutes up to forty-five minutes on each item.

My removable snatch roller overcomes this serious difficulty and makesit possible to irnmediately release the whipper wire of the main loadingcrane as soon as the item being loaded is lowered into the hold ontofour -by four pieces of Wood placed on the floor of the hold therebyfreeing the wires so that the whipper wire can be immediately releasedand sent up for loading another item.

vThe main object of my invention as above indicatedf is to lighten theburden of the loading or unloading crew of a ship and to save theloading and unloading time up to one-third less time than now requiredin loading and unloading a ship by the present means generallyvv in usethroughout the world.

Referring to the drawings.- Y

Fig. 1 is a side elevation of my device mounted on an H rail which isbroken at each `end for convenience in illustration and having a'hook ofa regular raising and lowering three part chain with pulley blocks. saidhook being broken away I for convenience in illustration;

Fig. 2 is a vertical section on the line 2-2 of Fig. l;

Fig. 3 is an end view of my device in the open position for mounting iton or removing it from the H Tail; #.,1

Fig. 4 is a plan view from inside the hold of a ship' looking up at thecombing.

In the drawings, 50 lis my complete removable snatch roller and 5is yaframe'preferably constructed lof steel or a metal of equal strengthhaving cross ears 6 integral therewith and projecting therefrom,centrally boredat 'I and adapted to receive pins'8 having heads 8integral therewith at one end andbeing threaded at the other end at 9Aover which threaded `nuts I0 are adapted to "be secured. Thelower end of5 terminates in an integral ring VI Ifinto which fits a hook I2 of theusual' raising and lowering `three part chainequippedwith the usualpulley blocks,Y only the broken'hookr I2 being vshownfor convenience sin illustratiom`v ff 'Near mengsel-@endet fraise YsN a iubuiar member 3|is formed integrally therewith and havingv y a central boring 32 'inalignment with borings 33 in roller carriers I3. p

A pair of roller carriers I3 yare pivotally hinged to the -earsll byrrfeainso'f4 pins' and 4"threaded, nuts I0. The upper ends o frollercarriers I3 terminate in `three sided roller housings I4 in each ofywhich are mounted three steel rollers I5 which have Abrass -linedvbushings I6 of usual lubricating structure. 'The rollers I5 are mountedon steel pins I9 threaded at one end at I'I to engage internallythreaded holes I8 in said roller housings-I4 andsaid pins I9 y'have nuts20 at theirfopposite ends integral therewith. Said pins I9'also havelubricating grooves 2I into the outer ends of whichare'threadedlubricating nipples 22 whereby lubricant .can be fedfdirectly throughnipples 221mm bushings It..l A threaded-lock pin 'f 23 is adapted tothread into a half threading 24 in roller housing I4 and adjacentthreading I'I of each of the pins I9 so as to lock them againstaccidental loosening and removal due to the almost constant rotation ofthe rollers I5 when Y my device is in use.

secured together in closed position by means of a vlocking pin 25 whichis threaded at one end 25 and adapted to engage an internally threadednut 21 integral `with one of the roller carriers I3 and 'the oppositeend of said locking pin 25 terminates in a flange 28 and a vflattenedportion 29 having a hole 38 therein adapted to be used by the regu` lar'ballhoolgA always carried by the longshoreman, for removing andreplacing said locking.

pin 25.

My removable snatch roller 50 is adapted to be l The pivoted rollercarriers I3 are adapted to be to be used must be equipped with H rails30 welded to the cross beams 34 of the coaming 35 or ceiling of the holdon each side of the hatchway 36 as shown in diagram in Fig. 4.

Pin 25 can then be removed by one of the longshoremen using his regularbail hook which each carries, and placing it through hole 38 turn pin 2Sso as to remove it thereby permitting roller carriers I3 to open attheir upper ends thereby permitting them to be placed around H rail 3Uand the pin 25 replaced by setting it up tightly by means of the bailhook used in hole 3B.

It is therefore a very simple operation to place my device in operatingposition on the H rail and to remove it when nished.

item being loaded or unloaded to be raised or v The actual operation ofmy device` permits the lowered by the usual three chain and block and spulley device in general use, shown in the broken oi hook l2 of saidapparatus. The suspended item being loaded or unloaded is then merelypushed along suspended by my device 50 which rolls on rail on rollers I5which are lubricated so that they roll perfectly and easily. v

In loading the items are lowered into the hold through the hatch 3,6linv the usual manner by means of a power operated crane on the pier oron the deck of the ship. With my device, as soon as the item is lowered-into the vhold it is lowered A onto blocks so that the Whipper Wirefrom the loading crane can be immediately freed and released to go upfor another load. My removable snatch roller combined with the usualthree chain block and pulley lifting device picks up 'theload i from theiioor and by pushing it rolls it to .the desired spot for storing forthe trip.

In unloading the whipper wire ofthe dock or deck crane is not requireduntil the item has been picked up and rolled suspended on the rail tothe spot directly under the hatch -36 and then the Whipper wire from themain crane is brought down and Without any delay immediately the load istaken up and another load is being brought under the hatchway 36 by mydevice ready for the immediate use of the whipper Wire and crane as soonas lowered into the hatchway 36.

So it is clear that my removable snatch -roller is equally valuable insaving up to one-third of the time in loading or unloading as well asmaterially lightening the heavy Work of the crew in placing and removingcargoes,

Many variations may be madein the structure 4 of my device withoutdeparting from the spirit and intent of the same and all such variationsare comprehended Within the scope of the specication, drawings andclaims as herein set forth.

I claim:

l. A removable snatch roller comprising in combination, a frameterminating at its lower end in hook hanging meansI a pair of rollercarriers pivotallyconnected'fat theirlowerends to an intermediateportion of said frame, a three sided roller housing provided at theupper end of each carrier and supporting a plurality of roller meansrotatably mounted on shafts therein said roller carriers being swingablefrom a position adjacent to .said frame to a spaced position, andreleasable means for securing the roller carriers in said flrst'positionwherein the releasable means include a locking pin extending through theroller carriers and an upper'; tubular portion of the frame. Y

.2. A removable heavy duty snatch roller1 Acomprising incombination, aheavy frame terminating at its lower end in heavy hook hanging means, apair of heavy duty roller carriers pivotally connected at theirlowerends to an intermediate portion of said frame, a roller housingprovided at the upper end of each carrier and rotatably supporting apluralityof heavy duty rollers thereon, said roller carriers beingswingable from a position adjacent to said frame to a spaced positiontherefrom, and removablemeans for securing the roller carriers 4in'saidrstposition wherein the releasablemeans.include a locking pin extendingthrough .the rollercarriersand an upper tubular portion of the'frar'ne.

` JOSEPH GUADAGNA.

References cited inthe fue cf this patent UNITED STATES PATENTS 494,451Germany .Mar. 22, 1030

